DE-R-022
fatal UBL
Rule text [DE-R-022]-If both supplier and customer are located in Germany, attached documents provided with an invoice in "ADDITIONAL SUPPORTING DOCUMENTS" (BG-24) shall have a unique filename (non case-sensitive) within the element ″Attached document″ (BT-125).
Where the rule is checked Syntax Severity Context (XPath) Test (XPath) Peppol-UBL fatal (/ubl-invoice:Invoice | /ubl-creditnote:CreditNote)[$supplierCountryIsDE and $customerCountryIsDE]count(cac:AdditionalDocumentReference) = count(cac:AdditionalDocumentReference[not(./cac:Attachment/cbc:EmbeddedDocumentBinaryObject/@filename = preceding-sibling::cac:AdditionalDocumentReference/cac:Attachment/cbc:EmbeddedDocumentBinaryObject/@filename)])
Business terms referenced BG-24, BT-125
Related rules BR-52 , BR-TMP-4 , BR-TMP-5 , CII-SR-476 , CII-DT-105 , CII-DT-106 , BR-DEX-01
Source: Peppol BIS Billing 3.0 Schematron, UBL (OpenPeppol, docs.peppol.eu validation artefacts 3.0.21) .
Check your invoice against this rule
KoSIT Validator 1.6.3 · XRechnung 3.0.2 configuration (2026-08-31) · EN16931 Schematron 1.3.16 · Peppol BIS Billing 3.0.21 (2026-05-20). Validation engine: KoSIT Validator (Apache-2.0) with the
XRechnung validator configuration (Apache-2.0), running the EN 16931 Schematron (EUPL-1.2) unmodified.
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